Thursday, July 18, 2013

History of Solar power

Solar power (electricity) is produced in two ways: by direct transformation of solar energy into current through photovoltaic panels (solar PV), or by the concentration of solar energy to create steam and drive a turbine (concentrated solar power).

Solar photovoltaics, which can be installed on your roof or in large ‘solar farms’, are relatively easy to understand. Solar energy in the form of light hits the solar panel, which excites electrons in the panel and creates an electric current. The current created by the solar panel is direct or DC current, and it flows to an inverter box which converts it into alternating or AC current (this is what’s used by all of your appliances and the electric grid in the United 

 Photo: Solar power (electricity) is produced in two ways: by direct transformation of solar energy into current through photovoltaic panels (solar PV), or by the concentration of solar energy to create steam and drive a turbine (concentrated solar power).

Solar photovoltaics, which can be installed on your roof or in large ‘solar farms’, are relatively easy to understand. Solar energy in the form of light hits the solar panel, which excites electrons in the panel and creates an electric current. The current created by the solar panel is direct or DC current, and it flows to an inverter box which converts it into alternating or AC current (this is what’s used by all of your appliances and the electric grid in the United States).

Most homeowners don’t know that residential solar panel systems are grid-tied, meaning that there is no backup battery system involved. Current supplied by the solar panels either flows into the home or into the grid through the home’s electric meter. In some areas the homeowner can be compensated for this surplus power.

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